Pitch change adapter for a helicopter main rotor system



FIG. 1 is a prospective view.

FIG. 2 is a front view.

FIG. 3 is a right side view.

FIG. 4 is a top view.

FIG. 5 is a left-side view.

FIG. 6 is a rear view; and,

FIG. 7 is a bottom view. 

The ornamental design for a pitch change adapter for a helicopter main rotor system, as shown and described. 